Binary Tools and Utilities.md

JDK Tools and Utilities –

Basic Tools –

1. java - The launcher for Java applications
2. javac - The compiler for the Java programming language
3. javadoc - API documentation generator
   In Eclipse IDE, Navigate to Project menu, and click Generate Javadoc to a target folder.
   this'll generate the javadoc, look for index.html, open it in web-browser, and we can see the documents generated,
   we can host the same on web server or roll-out to clients if required
4. javah - C header and stub generator. Used to write native methods
5. javap - Class file disassembler
   This gives us the structure of a java program (either user program or JDK classes like String, Object etc)
6. jdp - The Java Debugger
7. jdeps - Java class dependency analyzer
   

Java Troubleshooting, Profiling, Monitoring and Management Tools –

1. jcmd - JVM Diagnostic Commands tool - Sends diagnostic command requests to a running Java Virtual Machine
2. jconsole - A JMX-compliant graphical tool for monitoring a Java virtual machine.
   It can monitor both local and remote JVMs
3. jmc - The Java Mission Control (JMC) client includes tools to monitor and manage your Java application
   without introducing the performance overhead normally associated with these types of tools.
4. jvisualvm - A graphical tool that provides detailed information about the Java technology-based applications,
   while they are running in a Java Virtual Machine.
   Java VisualVM provides memory and CPU profiling, heap dump analysis, memory leak detection, access to MBeans,
   and garbage collection

Monitoring Tools –

1. jps - Experimental: JVM Process Status Tool - Lists instrumented HotSpot Java virtual machines on a target system
2. jstat - Experimental: JVM Statistics Monitoring Tool - Attaches to an instrumented HotSpot Java virtual machine
   and collects and logs performance statistics as specified by the command line options.
3. jstatd - Experimental: JVM jstat Daemon - Launches an RMI server application that monitors for the creation and
   termination of instrumented HotSpot Java virtual machines and provides a interface to allow remote monitoring tools
   to attach to Java virtual machines running on the local system

Troubleshooting Tools –

1. jhat - Experimental - Heap Dump Browser - Starts a web server on a heap dump file
   (for example, produced by jmap -dump), allowing the heap to be browsed.
2. jmap - Experimental - Memory Map for Java - Prints shared object memory maps or heap memory details
   of a given process or core file or a remote debug server.
3. jstack - Experimental - Stack Trace for Java - Prints a stack trace of threads
   for a given process or core file or remote debug server.

Reference:

1. https://docs.oracle.com/javase/8/docs/technotes/tools/